COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

To save fuel

To reduce the exit temperature

To increase the output

To increase the efficiency

60 to 70%

10 to 40%

40 to 60%

70 to 90%

The flow of air is parallel to the axis of the compressor

The maximum efficiency is higher than multistage axial flow compressors

The impeller rotates at high speeds

The static pressure of air in the impeller increases in order to provide centripetal force on the air

Drop gradually towards the point of use

Rise gradually towards the point of use

Be laid exactly horizontally

Be laid vertically

Compressor capacity

None of these

Free air delivery

Swept volume

Net work output and isentropic heat drop

Net work output and heat supplied

Net work output and work done by turbine

Actual heat drop and isentropic heat drop

Depends on other factors

More

Same

Less

All of these

Pressure ratio

Maximum cycle temperature

Minimum cycle temperature

Air stream blocking the passage

Motion of air at sonic velocity

Unsteady, periodic and reversed flow

Air stream not able to follow the blade contour

Ramjet

Turbo-propeller

Rocket

Turbojet